Question

Which mirror always forms an image smaller than the object?

• A. Concave
• B. Plane
• C. Convex
• D. None of these

Hint:

Convex mirrors are used as rear-view mirrors in vehicles precisely because they always provide a smaller, upright image and offer a wider field of view, allowing the driver to see more of the area behind them.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
The size of the image formed by a mirror depends on the type of mirror and the position of the object. The question asks which mirror always produces a diminished (smaller) image.

Step 2: Detailed Explanation:
\[\begin{array}{rl} \bullet & \text{Plane Mirror: A plane mirror always forms a virtual, erect image that is of the same size as the object. } \\ \bullet & \text{Concave Mirror: A concave mirror can form images of different sizes. It can form a diminished, same-sized, or magnified real image, as well as a magnified virtual image, depending on the object's distance from the mirror. Therefore, it does not always form a smaller image. } \\ \bullet & \text{Convex Mirror: A convex mirror always forms a virtual, erect, and diminished (smaller) image, regardless of where the object is placed in front of it. } \\ \end{array}\]

Step 3: Final Answer:
A convex mirror is the only type of mirror that always forms an image smaller than the object.